While fans cheered and applauded, people on social media quickly noticed one person who seemed...less convinced.

This guy. Right behind Trump. Plaid shirt dude.

Twitter

His name is Tyler Linfesty, 17, and he's a senior at Billings West High School. He found out Thursday morning that he won VIP seating at the rally through a raffle and the chance to take a picture with the president before the rally.

But we're just going to call him Plaid Shirt Guy for now.

You could tell by Plaid Shirt Guy's real-time reactions that he had a few questions for the president.

Trump: It's hard, and harder to win the popular vote!

Plaid Shirt Guy: O rly?

Trump: It's like the 100-yard dash versus running the mile.

Nicholas Kamm / AFP / Getty Images

Plaid Shirt Guy: Hrm.

Twitter

Linfesty told BuzzFeed News that he reacted how he would have if anyone said what Trump said.

"I tried to take each issue individually. Every time he said something I disagreed with, I apparently very visibly disagreed," Linfesty said. "I was the only person behind him who wasn’t cheering and clapping at everything he said. I wanted to be true to myself."

He remembers responding strongly to Trump's remarks about his tax plan.

"He said it’s making America do better and helping people in the middle class," Linfesty said. "That's false. The benefits only go to the 1%."

But he agreed when Trump said that the Democratic presidential primary had been "stolen" from Bernie Sanders.

"You can see me clapping and visibly agreeing with what he said," Linfesty pointed out.

A couple of other people in the crowd behind Trump were also replaced.

Nothing to see here!

A bunch of people thought he was asked to leave because he wasn't enthusiastic enough.

Weirdest thing just happened at Trump rally in Montana. The guy in plaid shirt behind Trump must not hv been cheering enough so a woman walked up and asked him to move and She took his spot #inners #maddow #LastWord https://t.co/pTOq2kBwgb

As part of the prize, Linfesty was able to have his picture taken with the president before the rally, which he took as another opportunity to troll the campaign.

He was wearing a pin with a rose on it, the logo of the Democratic Socialists Of America (DSA), while taking the picture, though he hasn't seen the resulting photo. He doesn't think he ever will. He made the pin, he said, by taping a DSA rose he printed himself over a University Of Pennsylvania pin. He also put it on during Trump's speech.

Linfesty said he largely agrees with the politics of the DSA, though he is not an official member. He said he'll be 18 by the midterms but declined to say who he'll vote for, although "it won't be Rosendale or Gianforte."

During the photo op, Linfesty also tried to trick Trump into signing a copy of The Communist Manifesto by wrapping it in a cover from Trump's own book The Art Of The Deal as a joke. He said he also asked Trump to sign a MAGA hat, but the president didn't sign either.

UPDATE

Sep. 07, 2018, at 21:22 PM

This story has been updated with the identity of Plaid Shirt Guy.

Otillia Steadman is the world news operations manager for BuzzFeed News and is based in New York.